If I may give some advise, you can replace one light then adjust the hid to the halogen line. Then do the other light and line it up to the other one -this is what i did.
I had no idea you NEEDED to adjust the hight with HIDs i thought something was broken. I crammed everything inside the housings and though I either bent the projector housing, or the bulb was not seated correctly. I managed to make the 9006s fit in the 9012 hole with out modification so after inspecting everything and saw nothing was bent i thought ill take them out and trim the tab.. well... i snapped the WHOLE tab off on one bulb.. fu%k... so i trimmed the other one and ordered new bulbs... So, im running one HID and one halogen till my new bulb comes in, this is why i can line up the HID to the stock light.
Use my post as advise, you NEED to adjust them, nothing is broken.. had i read somewhere that this was normal i never would of had to disassemble everything and break it.